Felsfokot

Felsfokot is a fictional mineral term used in speculative geology and science fiction to describe a rare, high-density silicate mineral. It is not recognized by real-world mineral catalogs, and no verified specimens are known to exist.

Etymology and usage: The name combines fels- from Germanic roots meaning rock with a constructed suffix -fokot, intended to evoke form or focus. The term circulated in online world‑building communities in the 2000s and has appeared in tabletop campaigns and short fiction as a plot device.

Properties: In speculative descriptions, felsfokot is a dense, dark mineral with a metallic to resinous luster. Colors are described as ranging from iron-black to deep blue-gray. Mohs hardness is imagined as 6–7, and density as 5.4–6.2 g/cm3. Crystallography is often described as monoclinic, though accounts vary. It is typically described as opaque and non-pleochroic.

Formation and occurrence: Felsfokot is placed in subduction-zone or high-temperature metamorphic contexts in fiction, said to form via metasomatic reactions between ultramafic rocks and silica-rich fluids or to be produced synthetically in experimental laboratories. Geographic distribution is fictional, tied to imagined tectonic settings or planetary analogs.

Uses and significance: In narrative uses, felsfokot is valued for hypothetical energy-storage capacity, catalytic properties, or as a component of exotic propulsion schemes. It serves as a storytelling device to illustrate geologic rarity and technological potential, rather than a real mineral with verified properties.

See also: fictional minerals, hypothetical minerals, list of minerals in science fiction.